diff --git a/buildbot/osuosl/master/config/builders.py b/buildbot/osuosl/master/config/builders.py
--- a/buildbot/osuosl/master/config/builders.py
+++ b/buildbot/osuosl/master/config/builders.py
@@ -2426,7 +2426,8 @@
          checks=["check-clangd"],
          targets=["clangd", "clangd-index-server", "clangd-indexer"],
          extra_configure_args=[
-             "-DLLVM_CCACHE_BUILD=ON",
+             "-DCMAKE_C_COMPILER_LAUNCHER=ccache",
+             "-DCMAKE_CXX_COMPILER_LAUNCHER=ccache",
              "-DLLVM_USE_SANITIZER=Thread",
              "-DCMAKE_BUILD_TYPE=Release",
              "-DCLANGD_ENABLE_REMOTE=ON",
@@ -2445,7 +2446,8 @@
          depends_on_projects=["llvm", "clang", "clang-tools-extra"],
          extra_configure_args=[
              "-DCMAKE_CXX_STANDARD=20",
-             "-DLLVM_CCACHE_BUILD=ON",
+             "-DCMAKE_C_COMPILER_LAUNCHER=ccache",
+             "-DCMAKE_CXX_COMPILER_LAUNCHER=ccache",
              "-DCMAKE_BUILD_TYPE=Release",
              "-DLLVM_ENABLE_ASSERTIONS=ON",
              # FIXME: Re-enable after cleaning up LLVM.